NSVA254 Apr. 2013 NewJRC SAW FILTER NSVA254 Application 1252.5MHz Low Power Transceiver Electrical Specification: (Table 1) The device characteristics are measured in the circuit shown in Fig.1. Table 1. Electrical Specifications Item Spec. Typ. Input and Output Impedance 50Ω - Nominal Center Frequency (f0) 1252.5MHz - Insertion Loss 1252~1253MHz 3.5dB max. 2.8dB Response Variation 1252~1253MHz 1.5dB max. 0.3dB Input and Output VSWR 1252~1253MHz 2.0 max. 1.5 Out of Band Re.